About Us

HazSubs Services Ltd

Hazsubs Services offers expert advice in the management and compliance of hazardous substances. This includes business analysis, certification and training of staff to provide you with the best solution for a safe business.

Established in 1996, HazSubs Services has helped thousands of Kiwi businesses over the years with Training, HSW Certification and Certified Handler renewals. Our team has a combined 50 years of experience, plus the latest insight into New Zealand Hazardous Substances Regulations (HSW). An efficient, trustworthy service to protect your company, staff, and environment.

From the inception of HSNO, Hazsubs Services are proud and honoured to have the #1 Test certifier Ian Donald and now a team of experienced certifiers onboard.

image of hazsubs logo big

Aaron Donald BIfsc

Managing Director

Aaron's experience and implemented changes have seen the company grow over the last 10 years. His mechanical knowledge and ability to find solutions has provided clients with a means to Certification across all industry types within Hazardous Substance compliance.



  • Registered WorkSafe NZ HSNO Test Certifier and HSW Compliance Certifier
  • NZ Fireworks Testing Agent
  • Over 10 years HSNO implementation + Since 2017 HSW controls
  • 15 years adult trainer
  • 15 years sports facilitator 
  • Bachelor of Information Sciences
  • 5 years IT Test Analyst


  • Registered WorkSafe NZ HSNO Test Certifier and Compliance Certifier/Consultant
  • Api650 Stationary Tank course attendance
  • Approved Pyrotechnican
  • Oil and Gas Explosion Safety
  • Bachelor of Information Sciences
  • Certified IT Test Analyst
  • Qualified Marine Engineer
  • 1st Aid Registered


Kat Ritchie NZIM 

Trainee Compliance Certifier

Kat has been providing environment, health and safety services over several years were she has helped clients in the chemical warehousing industries. 

Kat is in the process of finalising her compliance certification approvals.

Having achieved NZ Diploma in Workplace Health and Safety Management and NZIM Diploma in Management Kat is focused on delivering expert advise to our client base. 


Troy Garforth

Compliance Certifier Trainee

Troy recently joined Hazsubs and brings more than 20 years experience within the explosives industries and a hazardous substances focus. Troy is activity conducting site inspections and providing expert advise for all class 1 locations. 

troy@hazsubs.co.nz 09 443 3054

Bhavika Lal

Finance/Account Management

Bhavika is responsible for our company financials. She has been with HazSubs from 2015 and provides all our financial requirements and account management.

finance@hazsubs.co.nz 09 443 3054


Amy Grenfell

Customer Support/Admin

Amy having joined HazSubs 2022 she has provided staff with the support services they need.

office1@hazsubs.co.nz 09 443 3054

#1 Test Certifier with over 50 years experience